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Demons have an 8% chance of gaining defense (meaning it will appear almost every game).
As mentioned above, Grok specializes in logistics and teleportation, which is very, very helpful when breaking through archers, especially if there are no siege weapons (but there will still be losses at the beginning).
Roty, I have a question for you (it's more of a rhetorical question, since I often play as Demons and doubt that there is anything universally effective in this regard).
How do you take Dragon Utopia? (Ideally, with minimal losses, because it's impossible for Inferno to do it without any losses at all.) I'm not talking about a hero of level 30+ with tons of troops, but about an average hero – level 18-20, with about 4-5 weeks of development. For me, this is a complete disappointment, especially when you know how other races have fun with this. If you don't have Dark Magic, things can be very, very bad (especially if you get level 3 difficulty in the Utopia, because the number of dragons and the reward vary there).
I won't even mention Phoenixes (for example, on the "Grab and Run" map or the "Contested Island"), it's even worse there.
Without Dark Magic, it will be quite difficult in the late game, seriously. I've already tried it.
With average development, at levels 17-20, you can manage without it. But at level 27 and higher, it becomes difficult (because the enemy has a lot of troops) and there are units that are especially dangerous. Of course, resistances play a role, I don't deny it. But what if you get the Staff of Sar-Izzy?
It's a matter of luck.
I also usually take Defense for the Demons (it helps a lot).
Let's play together sometime, discuss some points, and maybe we can learn some new tactics from each other.